I is for Illumination

Illumination \Il*lu`mi*na”tion\, n. [L. illuminatio: cf. F. illumination.]

1. a condition of spiritual awareness; divine illumination; “follow God’s light” [syn: {light}]
2. the degree of visibility of your environment
3. an interpretation that removes obstacles to understanding; “the professor’s clarification helped her to understand the textbook” [syn: {clarification}, {elucidation}]
4. the luminous flux incident on a unit area [syn: {illuminance}]
5. painting or drawing included in a book (especially in illuminated medieval manuscripts) [syn: {miniature}]

This two pics are taken at the new Terminal 4 of Barajas airport. Being that I spend there at least a couple of hours every month, I had already enough time to enjoy it ;) Anyway, you can see two different kinds of illumination for a very big “organic” building. The first picture shows indirect illumination, this is achieved by reflecting the light on a couple of mirrored dishes. The second one is sort of filtered natural illumination. A very big window opens on the building’s ceiling (you can see the sky through it), and then filtered through movable pannels.